/// <summary>
/// Register a callback to be invoked when the given Channel UUID hangs up.
/// </summary>
/// <param name="uuid">The Channel UUID.</param>
/// <param name="action">A Callback to be invoked on hangup.</param>
public void OnHangup(string uuid, Action <EventMessage> action)
{
ChannelEvents.Where(x => x.UUID == uuid && x.EventName == EventName.ChannelHangup).Take(1).Subscribe(action);
}
/// <summary>
/// Asynchronously executes a dialplan application on the given channel.
/// </summary>
/// <remarks>
/// See https://freeswitch.org/confluence/display/FREESWITCH/mod_dptools
/// </remarks>
/// <param name="uuid">The channel UUID.</param>
/// <param name="application">The dialplan application to execute.</param>
/// <param name="applicationArguments">(Optional) arguments to pass to the application.</param>
/// <param name="eventLock">(Default: false) Whether to block the socket until the application completes before processing further.
/// (see https://wiki.freeswitch.org/wiki/Event_Socket_Outbound#Q:_Ordering_and_async_keyword )</param>
/// <param name="async">(Default: false) Whether to return control from the application immediately.
/// (see https://wiki.freeswitch.org/wiki/Event_Socket_Outbound#Q:_Should_I_use_sync_mode_or_async_mode.3F)
/// </param>
/// <param name="loops">(Optional) How many times to repeat the application.</param>
/// <returns>
/// A Task of <seealso cref="EventMessage"/> that wraps the ChannelExecuteComplete event if the application completes successfully.
/// The Task result will be null if the application did not execute, for example, the socket disconnected or the channel was hung up.
/// </returns>
public Task <ChannelEvent> ExecuteApplication(
string uuid, string application, string applicationArguments = null, bool eventLock = false, bool async = false, int loops = 1)
{
if (uuid == null)
{
throw new ArgumentNullException("uuid");
}
if (application == null)
{
throw new ArgumentNullException("application");
}
//lists.freeswitch.org/pipermail/freeswitch-users/2013-May/095329.html
var applicationUUID = Guid.NewGuid().ToString();
var sb = StringBuilderPool.Allocate();
sb.AppendFormat("sendmsg {0}\nEvent-UUID: {1}\ncall-command: execute\nexecute-app-name: {2}\n", uuid, applicationUUID, application);
if (eventLock)
{
sb.Append("event-lock: true\n");
}
if (loops > 1)
{
sb.Append("loops: " + loops + "\n");
}
if (async)
{
sb.Append("async: true\n");
}
if (applicationArguments != null)
{
sb.AppendFormat("content-type: text/plain\ncontent-length: {0}\n\n{1}\n", applicationArguments.Length, applicationArguments);
}
var tcs = new TaskCompletionSource <ChannelEvent>();
var subscriptions = new CompositeDisposable();
if (cts.Token.CanBeCanceled)
{
subscriptions.Add(cts.Token.Register(() => tcs.TrySetCanceled()));
}
subscriptions.Add(
ChannelEvents.Where(
x => x.EventName == EventName.ChannelExecuteComplete && x.Headers["Application-UUID"] == applicationUUID)
.Take(1)
.Subscribe(
executeCompleteEvent =>
{
if (executeCompleteEvent != null)
{
Console.WriteLine("{0} ChannelExecuteComplete [{1} {2} {3}]".Fmt(
executeCompleteEvent.UUID,
executeCompleteEvent.AnswerState,
executeCompleteEvent.Headers[HeaderNames.Application],
executeCompleteEvent.Headers[HeaderNames.ApplicationResponse]));
}
else
{
Console.WriteLine("No ChannelExecuteComplete event received for {0}".Fmt(application));
}
tcs.TrySetResult(executeCompleteEvent);
},
ex => tcs.TrySetException(ex),
subscriptions.Dispose));
SubscribeEvents(EventName.ChannelExecuteComplete).ContinueWith(t =>
{
if (t.IsCompleted)
{
SendCommand(StringBuilderPool.ReturnAndFree(sb))
.Then(reply =>
{
if (!reply.Success)
{
tcs.TrySetResult(null);
}
})
.ContinueOnFaultedOrCancelled(tcs, subscriptions.Dispose);
}
else
{
tcs.TrySetException(t.Exception);
}
});
return(tcs.Task);
}
